Claims:
1. A headlamp washing system (100) for a vehicle (302), the system comprising:
a photo sensor (102) to detect an intensity value of a headlamp (110);
a water level circuit (106) to measure a water level value of a washer bottle;
a body control module (104) coupled to the photo sensor (102) and the water level circuit (106), wherein the body control module (104), is configured to generate an instruction signal based on the water level value and the intensity value received from the water level circuit (106) and the photo sensor (102), respectively; and
a washer system (108) connected to the body control module (104), wherein the washer system (108), based upon the instruction signal received from the body control module (104), performs a function of washing.

2. The headlamp washing system (100) as claimed in claim 1, wherein the function of washing comprises one of activating the washer system (108) at a high pressure with a high speed, activating the washer system (108) at a low pressure with a low speed, deactivating the washer system, and activating the washer system (108) to wash the photo sensor (102).

3. The headlamp washing system (100) as claimed in claim 1, wherein the instruction signal to activate the washer system (108) at the high pressure with the high speed is generated, when the intensity value is less than a predefined threshold value.

4. The headlamp washing system (100) as claimed in claim 1, wherein the instruction signal to activate the washer system (108) at the low pressure with the low speed, is generated, when the intensity value is greater than the predefined threshold value.

5. The headlamp washing system (100) as claimed in claim 1, wherein the wherein the instruction signal to de-activate the washer system (108), when the water level in the washer bottle is below a predefined threshold value.

6. The headlamp washing system (100) as claimed in claim 1, wherein the wherein the instruction signal to activate the washer system (108) in order to wash the photo sensor (102), is generated, when an opaque value is generated.

7. The headlamp washing system (100) as claimed in claim 1, wherein the instruction signal to de-activate the washer system (108), is generated, when the intensity value is equal to the predefined threshold value.

8. A method for headlamp washing, the method comprising the steps of:
detecting, by a photo sensor (102), an intensity value of a headlamp (110);
measuring, by a water level circuit (106), a water level value of a washer bottle;
generating, by a body control module (104), an instruction signal based on the water level value and the intensity value received from the water level circuit (106) and the photo sensor (102), respectively; and
performing, by a washer system (108), a function of washing based upon the instruction signal received from the body control module (104).

9.The method for headlamp washing as claimed in claim 8, wherein the function of washing comprises one of, activating the washer system (108) at the high pressure and at the high speed, activating the washer system (108) at the low pressure and at the low speed, deactivating the washer system (108), and activating the washer system (108) to wash the photo sensor (102).

10. The method as claimed in claim 8, wherein the instruction signal to activate the washer system (108) at the high pressure with the high speed is generated, when the intensity value is less than the predefined threshold value.

11. The method as claimed in claim 8, wherein the instruction signal to activate the washer system (108) at the low pressure with the low speed, is generated, when the intensity value is greater than the predefined threshold value.

12. The method as claimed in claim 8, wherein the instruction signal to de-activate the washer system (108), when the water level in the washer bottle is below the predefined threshold value.

13. The method as claimed in claim 8, wherein the instruction signal to activate the washer system (108) in order to wash the photo sensor (102), is generated, when the opaque value is generated.

14. The method as claimed in claim 8, wherein the instruction signal to de-activate the washer system (108), is generated, when the intensity value is equal to the predefined threshold value.
, Description:FORM 2

THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003

COMPLETE SPECIFICATION
(See Section 10 and Rule 13)

Title of invention:
A HEADLAMP WASHING SYSTEM

Applicant:
Tata Motors Limited
A company Incorporated in India under the Companies Act, 1956
Having address:
Bombay House, 24 Homi Mody Street,
Hutatma Chowk, Mumbai 400001,
Maharashtra, India

The following specification describes the invention and the manner in which it is to be performed.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PRIORITY
[001] The present application does not claim priority from any patent application.

TECHNICAL FIELD
[002] The present subject matter described herein, in general, relates to a headlamp washing system for automotive vehicles, and more particularly, the present subject matter describes the automatic headlamp washing system.

BACKGROUND
[003] Many times, in vehicles, cover lenses of headlamps or fog lamps become dirty or mud gets accumulated on the cover lenses of the headlamps or the fog lamps. This leads to reduction in the intensity of the light emitted from the headlamp. Further, this leads to the problem of visibility of road at nighttime for a driver. In such scenarios, the driver needs to get out of the vehicle and wash the cover lenses manually to clean the dirt accumulated on the cover lenses. This leads to the discomfort of the driver.
SUMMARY
[004] Before the present systems and methods are described, it is to be understood that this application is not limited to the particular systems, and methodologies described, as there can be multiple possible embodiments, which are not expressly illustrated, in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present application. This summary is provided to introduce concepts related to a system and a method for headlamp washing in a vehicle, and the concepts are further described below in the detailed description. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the claimed subject matter.
[005] In one implementation, a headlamp washing system is illustrated. The system may comprise a photo sensor, a water level circuit, a body control module, and a washer system. The photo sensor may detect an intensity value of a headlamp. Further, the water level circuit measures a water level value of a washer bottle. Furthermore, the body control module is coupled to the photo sensor and the water level circuit, whereas the body control module generates an instruction signal based on the water level value and the intensity value received from the water level circuit and the photo sensor. In addition, the washer system is connected to the body control module. In one aspect, the washer system performs a function of washing based upon the instruction signal received from the body control module.

In another implementation, a method for headlamp washing is illustrated. In one aspect, a photo sensor may detect an intensity value of a headlamp. In another aspect, a water level circuit may measure the water level value of a washer bottle. In one another aspect, the body control module may generate an instruction signal based on the water level value and the intensity value received from the water level circuit and the photo sensor. In yet another aspect, a washer system may perform a function of washing based upon the instruction signal received from the body control module.

BRIEF DESCRIPTION OF THE DRAWINGS
[006] The foregoing detailed description of embodiments is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the disclosure, example constructions of the disclosure are shown in the present document; however, the disclosure is not limited to the specific methods and apparatus disclosed in the document and the drawings.
[007] The detailed description is given with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to refer like features and components.
[008] Figure 1 illustrates a block diagram of a headlamp washing system, in accordance with an embodiment of the present subject matter.
[009] Figure 2 illustrates a schematic diagram of a headlamp washing system, in accordance with an embodiment of the present subject matter.
[0010] Figure 3 illustrates a flowchart describing a method for washing a headlamp, in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[0011] Some embodiments of this disclosure, illustrating all its features, will now be discussed in detail. It must also be noted that as used herein and in the appended claims, the singular forms "a," "an," and "the" include plural references unless the context clearly dictates otherwise. The disclosed embodiments are merely exemplary of the disclosure, which may be embodied in various forms.
[0012] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to other embodiments of the system and the method for headlamp washing. However, one of ordinary skill in the art will readily recognize that the present disclosure of the system and method for headlamp washing is not intended to be limited to the embodiments illustrated, but is to be accorded the widest scope consistent with the principles and features described herein.
[0013] As described above, there are some limitations in washing a lens cover of headlamps. It is to be noted that, the dirt or mud saturated on the lens cover of the headlamp leads to reduction in the intensity of the light coming out of the cover lenses due to the opaqueness created by the mud or dirt. Thus, this leads to the problem of visibility of road at nighttime for the driver while driving the vehicle. Further, the cover lenses need to be washed in order to clean the dirt accumulated on the lenses in order to get a clear vision of the road for the driver. Conventionally, the driver of a vehicle may need to come out of the vehicle and wash the headlamp manually. Thus, washing the lens cover of the headlamp manually may create discomfort for the driver. Thus, there is a need to overcome the problems identified as above.
[0014] In one implementation, a system for headlamp washing is illustrated. The system may comprise a photo sensor, a water level circuit, a body control module, and a washer system. The photo sensor detects an intensity value of a headlamp. Further, the water level circuit measures a water level value of a washer bottle. Furthermore, the body control module is coupled to the photo sensor and the water level circuit, whereas the body control module generates an instruction based on the water level value and the intensity value. In addition, a washer system is connected to the body control module to perform the function of washing based on the received signal from the body control module.
[0015] Referring now to Figure 1 and Figure 2, a headlamp washing system 100 and a schematic diagram 200 of a headlamp washing system is illustrated, in accordance with an embodiment of the present subject matter. The headlamp washing system 100 comprises a photo sensor 102, a body control module 104, a water level circuit 106, and a washer system 108. In one implementation, washing the headlamp 110 may be washing a lens cover of the headlamp 110. In one aspect, the photo sensor 102 may be a Light Dependent Resistor (LDR), a photovoltaic sensor, photo diode, and the like. In one embodiment, the photo sensor 102 detects an intensity value of a headlamp 110. In another aspect, the photo sensor 102 detects a light emitted from the headlamp 110, thereby indicating the intensity value. The water level circuit 106 measures a water level value of a washer bottle (not shown). The washer bottle may be coupled to a spray nozzle 204. Further, the body control module 104 is coupled to the photo sensor 102 and the water level circuit 106.
[0016] During operation, upon receiving the water level value and the intensity value, the body control module 104 generates an instruction signal based on the water level value and the intensity value. Further, the washer system (108) performs a function of washing based upon the instruction signal received from the body control module (104). The instruction signal may activate the washer system 108 at a high-pressure with a high speed, activate the washer system 108 at a low pressure with a low speed, deactivate the washer system 108, and activate the washer system 108 to wash a lens cover of the photo sensor 102. In another embodiment, the washer system 108 executes the instruction. In another aspect, the washer system 108 may be connected to the body control module 104.
[0017] In one example, the body control module 104 activates the washer system 108 to wash or clean the lens cover of the headlamp 110 at the high pressure with the high speed, when the intensity value is less than a predefined threshold value. The body control module 104 may hold the predefined threshold value. The body control module 104 may compare the actual intensity value with the predefined threshold value. Further, in one aspect, the high pressure may be the pressure at which the water is sprayed on the lens cover, and the high speed may be the speed of water 206 sprayed on the lens cover of the headlamp 110. The spray nozzle 204 may spray the water 206. In another aspect, the lens cover of the headlamp 110 may be washed by using the spray nozzle 204 by spraying water 206 on the headlamp 110 (as shown in figure 2). The spray nozzle 204 may be attached (or secured) to the outer surface of the lens cover of the headlamp 110. Further, the washer system 108 may be activated by a washer relay (not shown) on the receipt of the instruction signal from the body control module 104. In another example, the body control module 104 activates the washer system 108 to wash or clean the lens cover of the headlamp 110 at the low pressure with the low speed, when the intensity value is greater than the predefined threshold value.
[0018] In one another example, the body control module 104 deactivates the washer system, when the water level in the washer bottle is below a predefined threshold value. In one aspect, the body control module 104 may compare the actual water level with the predefined threshold value. In yet another example, the body control module 104 deactivates the washer system 108, when the intensity value is equal to the predefined threshold value. In yet another example, the body control module 104 activates the washer system 108 in order to wash the lens cover of the photo sensor 102, when the photo sensor 102 detects an opaque value. The opaque value may be no light detected by the photo sensor 102 from the headlamp 110.
[0019] In some embodiments, a switch 112 may be provided to activate the washer system 108, when the body control module 104 fails to operate the instructions. The switch 112 may be coupled to the body control module. The switch 112 may be located on a dashboard panel (not shown) of a vehicle 202.
[0020] Referring now to Figure 3, a method 300 for headlamp washing operation is shown, in accordance with an embodiment of the present subject matter.
[0021] At block 302, an intensity value of a headlamp 110 is detected. In one example, the intensity value is detected by a photo sensor 102.
[0022] At block 304, a water level value of a washer bottle is measured. In one example, the water level value is measured by a water level circuit 106.
[0023] At block 306, an instruction signal is generated by a body control module 104. In one example, the instruction signal is generated based on the water level value and the intensity value received from the water level circuit (106) and the photo sensor (102).
[0024] At block 308, a function of washing is performed based upon the instruction signal received from the body control module (104).
[0025] Although implementations for methods and systems for the headlamp washing have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not necessarily limited to the specific features or methods described. Rather, the specific features and methods are disclosed as examples of implementations for the headlamp washing.